I did the exact same thing as mmc. After painstakingly taking over a losely defended castle (my first), I respectfully ask for it be awarded to me. King Ragnar aka Gimli, however, decided to give it to another lord and deemed it sufficient that I be compensated with a measly 900 denar.
It was an injustice so decided to denounce his rule and take the castle for myself. The only problem is, all the other faction declared war against my very small rebel group.
Is there a way to propose peace or some other diplomatic actions to the other factions? I can't seem to find one. Also, can I recruit other lords to join my rebel group?